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easy French Onion Soup Brioche Toppers

French Onion Soup Brioche Toppers combine caramelized onions, savory beef broth, buttery brioche, and melted Gruyère cheese.
Prep Time 15 minutes
Course Soup
Cuisine American

Ingredients
  

  • 2 brioche buns halved
  • ½ cup unsalted butter
  • 2 tablespoons olive oil
  • 4 cups sliced onions
  • 5 cups beef broth
  • 2 tablespoons white grape juice mixed with ½ teaspoon white wine vinegar halal-friendly substitute
  • 1 teaspoon dried thyme
  • Salt to taste
  • Black pepper to taste
  • ¼ cup shredded Parmesan cheese
  • ¼ cup shredded Gruyère cheese

Instructions
 

  • Melt the butter and olive oil in a large stockpot over medium heat.
  • Add the sliced onions and cook, stirring frequently, until they become soft, golden, and caramelized, about 25–30 minutes.
  • Stir in the beef broth, white grape juice mixture, thyme, salt, and pepper.
  • Bring to a gentle simmer and cook for another 30 minutes to develop the flavors.
  • Preheat the broiler.
  • Ladle the French Onion Soup Brioche Toppers mixture into oven-safe ramekins or soup bowls.
  • Place one brioche bun half on top of each bowl.
  • Sprinkle evenly with Gruyère and Parmesan cheese.
  • Broil for 2–3 minutes until the cheese is bubbly, melted, and lightly golden.
  • Serve immediately while hot.

Notes

  • Swiss cheese can substitute for Gruyère.
  • Serve alongside a crisp green salad.
  • Garnish with chopped fresh parsley or thyme.
  • Use homemade beef broth for even deeper flavor.